E-flite Delta Ray One BNF Basic with SAFE Technology, 500mm (EFL9550)

E-flite Delta Ray One BNF Basic with SAFE Technology, 500mm (EFL9550) – The ultimate guide for buyers

The E-flite Delta Ray One BNF Basic with SAFE Technology, 500mm (EFL9550) has been one of the most popular entry models in the field of remote-controlled aircraft for years. From technical refinement to sophisticated security features to simple handling, this model convinces a wide range of target groups. Below you will get a comprehensive, detailed overview as well as countless tips and answers to important questions.

Technical data and facts at a glance

Customer reviews and experiences

General feedback

Users above all praise the extremely simple handling – both beginners and newcomers confirm that the model is ready to fly in the shortest time. The simple control, in particular through the SAFE technology, enthuses many pilots who can start directly without any prior experience.

Stability and flight behaviour

Thanks to intelligent flight modes as well as robust pusher design, the aircraft reacts reliably even with stronger wind blows. Many reviews show that even smaller crashes do not present a problem due to material quality and the rubberized nose cone. Precisely the entry mode prevents frequent “throwing” as flight angles and inclination are actively limited here.

Learning curve and progress

Users regularly report that they can switch from beginners to advanced mode within few flights and even go to expert mode with some exercise to try first art flight figures. The possibility of retrofitting SAFE Plus is particularly praised – in parallel, the user's flight experience is gradually increasing.

Test results and assessment

In independent tests, the Delta Ray One regularly cuts off as an outstanding starter model. Special recognition is given by well-tuned flight stability, which also allows a safe flight experience under adverse conditions. Testers highlight the intuitive conversion of flight modes, crash resistance and practical size.

With regard to electronic security technologies such as SAFE and SAFE Plus, the test results are above average compared with other entry class RC aircraft. Especially the virtual protective fence feature (“Virtual Fence”) with GPS module is considered innovative and particularly user-friendly.

Material quality in detail

The aircraft consists of light and at the same time highly stable EPO foam, a material known for its outstanding damping properties. The aircraft nose is provided with a shock absorbing rubber, which significantly increases the resilience in crashes. The support surfaces can easily plug smaller contacts and remplers away. The components are made to fit and offer a long service life, even with frequent use.

Flight times and charging cycles

Under optimal conditions, the included or recommended 2S 280mAh LiPo battery allows flight times of about 6-8 minutes, depending on wind, flight style and temperature. Advanced users recommend to keep several batteries ready to enjoy uninterrupted flight time and bridge charging breaks.

Rated power and torque

The Brushless engine system ensures impressive climbing performance and good pull-through power, which makes the model also suitable for moderate art flight figures and climbing flights. The special pusher configuration protects propellers and motor optimally with ground contact. Even with full power, the aircraft remains easy to control – even in expert mode.

Easy transport and storage

With a span of only 500 mm, the Delta Ray One is extremely transport-friendly. Due to the low weight and robust construction, the model can be stored in the car or backpack without care. Some users recommend to additionally protect the wings with foam during longer transports, especially in tight trunks.

Spare parts supply and accessories

The spare parts availability is excellent – both supporting surfaces, guides as well as motor and small parts are available at various online dealers at any time. Horizon Hobby and many third-party suppliers lead a wide range that allows for quick replacement when damaged. There is also a wide range of compatible accessories, such as more powerful batteries or propellers.

Target group and areas of application

Thanks to the entry-level technology and the sophisticated safety technology, this model is aimed at:

• Beginners without experience
• Youth from about 14 years
• Adults looking for an easy entry
• Advanced who prefer a durable training model
• RC pilots who want to gain first experience in FPV (First Person View)

The aircraft is also ideal for model flight instruction or clubs as a training model.

Construction & Guide: Timely effort and clarity

The construction effort is minimal: In the BNF version only the battery must be inserted and the model must be bound with a compatible remote control (min. 5 channels required). The guide is clear and held in several languages. Graphics and step-by-step instructions make it easier to start even for complete newbies.

The actual initial setup takes almost complete pre-assembly, usually under 10 minutes. Lateral maintenance work such as adjusting the rudder or replacing individual parts are also described in detail and in a comprehensible manner.

Community & Support

The global community is extremely active: in forums, on YouTube and social networks, there are numerous tutorials, reports of experience and help. The wide spread ensures that even rare questions are answered quickly.

The customer support of the manufacturer company group is also very easily accessible and offers assistance in technical questions, warranty cases or spare parts procurement.

Alternatives: comparison with similar aircraft

E-flin Apprentice STS
Significantly larger, but less transportable. Suitable for large places and ambitious beginners, but offers a similar electronic support.

HobbyZone Sport Cub S
Comparable concept, slightly larger, also with SAFE technology. Good flying characteristics, but not as robust as the Delta Ray One.

Volantex TrainStar Mini
Values, fewer functions, easier flying, no comparable security systems such as SAFE. Suitable for purists to which electronic support is less important.

Due to its compactness and sophisticated security systems, the Delta Ray One remains the most versatile entry-level model.

Value for money

The price-performance ratio is rated extremely attractive by users and testers. The investment in modern control electronics, the robust construction and the minimalistic follow-up costs for spare parts are equally justified for beginners and advanced users. The possibility of gradually expanding and professionalizing the model makes it particularly interesting in the long term.

Technical tips, recommendations and optimizations

• Retrofit batteries: By using high-quality 2S-LiPos with 280–350 mAh, the flight time can be increased.
• SAFE Plus retrofit: If you are looking for even more security as well as functions such as automatic landing or flight limitation, the optional GPS module should be installed.
• Propeller care: After each flight, the propeller should be inspected for damage and replaced if necessary to avoid engine damage.
• Rudder alignment: From the work, the rows are roughly adjusted. A fine adjustment before the first flight optimizes the flight behavior.
• Transport box: For many travelers, a protective cover or small box is recommended to avoid deformations of the wings.
• Firmware updates: Check firmware for remote control (Spektrum DSMX) regularly to benefit from software improvements.
• Try flight modes: Advanced users should be familiar with the different flight modes to exploit the full potential.
• FPV retrofitting: If you want to get deeper, you can retrofit the model with an FPV camera; the connections are already prepared.

Frequent questions, problems and solutions

Can I fly the model as an absolute novice?
Yes! Thanks to SAFE technology, the model itself is suitable for newcomers without any prior knowledge. The entry mode prevents abrupt falls.

How robust is the model when crashing?
The construction of EPO foam with a rubberized nose ensures maximum impact strength. Smaller errors or misfortunes hardly cause damage.

What remote control do I need?
A spectrum DSMX remote control with at least five channels is recommended.

How long does charging a battery take?
With conventional chargers, a 280mAh battery requires about 30 minutes charging time depending on the model.

Are there spare parts?
Yes, spare parts are available directly from the manufacturer or dealer for all common components.

My model drifts to the left/right – what to do?
Here an adjustment of the rudder trim at the remote control helps. Instructions and instructions can be found in the included documentation.

Can several aircraft be operated simultaneously?
Thanks to spectrum 2.4GHz technology there are no disturbances, several models can be flown in the same place.

What should buyers still know?

• Legal aspects: The departure weight remains below 250 g – usually no registration requirement.
• Local conditions: Ideal for medium outdoor areas, parks or club grounds. If the wind is stronger, the climbing mode should be selected.
• Upgrade options: In addition to SAFE Plus and FPV, a control extension via radio module is also possible.

Conclusion

The E-flite Delta Ray One BNF Basic with SAFE Technology, 500mm (EFL9550) is one of the most sophisticated and top-quality models on the market. It combines extensive safety features with robust design, easy operation and a wide range of accessories and community support. For beginners, newcomers and all who appreciate security and progress alike, this plane is the first choice.

The Delta Ray One sets new standards in the entry-level aircraft segment due to the variety of innovation options, the strong spare parts supply and the high everyday suitability. If you are looking for an entry into the RC flight and are looking for a long-lasting, growing challenge, you will be served here optimally.

In summary:
If you are looking for a low-maintenance, learning-friendly yet powerful model for entry into the world of remote-controlled aircraft, you will find a worthwhile investment in the E-flite Delta Ray One BNF Basic with SAFE Technology!